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CKA study material · question 501 of 1000

You are asked to design a disaster-recovery procedure that can rebuild the entire cluster state after every control plane node is lost. Backing up which component captures all of that state?

  1. kube-controller-manager's leader election Leases
  2. The kubelet's local pod manifest directory on each node
  3. etcd
  4. The kube-apiserver in-memory watch cache
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Answer: C. etcd

etcd holds every object the API server persists, so an etcd snapshot is a snapshot of the cluster. Static pod manifests cover only the control plane's own containers, and the watch cache is derived state that is rebuilt from etcd.

Source: Kubernetes Components (Kubernetes) — Core Components › Control Plane Components

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